TW284854B - Machine-vision illumination system and method - Google Patents

Machine-vision illumination system and method

Info

Publication number
TW284854B
TW284854B TW084112218A TW84112218A TW284854B TW 284854 B TW284854 B TW 284854B TW 084112218 A TW084112218 A TW 084112218A TW 84112218 A TW84112218 A TW 84112218A TW 284854 B TW284854 B TW 284854B
Authority
TW
Taiwan
Prior art keywords
light
focusing element
provides
present
straight
Prior art date
Application number
TW084112218A
Other languages
Chinese (zh)
Inventor
A Lebens Gary
Original Assignee
Ppt Vision Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ppt Vision Inc filed Critical Ppt Vision Inc
Application granted granted Critical
Publication of TW284854B publication Critical patent/TW284854B/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

The present invention takes advantage of the efficiency of high-brightness red, infra-red, or other color LEDs arranged in a single row, the properties inherent to a focusing element such as a cylindrical lens, as well as the advantages of having a straight-edged diaphragm and a light-absorbing enclosure to produce an illumination source for machine-vision systems. The illumination source exhibits multi-directional properties on one side of an imaginary plane defined by the positions of the row of LEDs, the straight-edged diaphragm, and the focusing element, and minimize light cast on the other side of the plane, The present invention provides a compact light line generator which has no shadowing or secondary lines. The present invention also provides a method for measuring the height of a raised surface. The present invention provides a method and apparatus which provide an illumination source for illuminating an object in a machine-vision system, and includes a light source emitting light from a plurality of points, the points being on a straight line, a focusing element, the focusing element focusing light from the light source in one dimension to a focal line, in which the focusing element is separated from the straight line by adistance sufficient to focus rays from the plurality of points into the focal line, and in which there is a light path from the straight line to the focusing element and then to the focal line, and a first diaphragm located in the light path and defining a sharp edge in the rays. This embodiment provides a light which has a sharply defined virtual surface which separates lighted areas from areas not lit, and within the lighted areas, provides light from multiple directions to reduce shadowing.
TW084112218A 1995-10-12 1995-11-17 Machine-vision illumination system and method TW284854B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/532,213 US5745176A (en) 1995-10-12 1995-10-12 Machine-vision illumination system and method for delineating a lighted volume from an unlighted volume

Publications (1)

Publication Number Publication Date
TW284854B true TW284854B (en) 1996-09-01

Family

ID=24120844

Family Applications (1)

Application Number Title Priority Date Filing Date
TW084112218A TW284854B (en) 1995-10-12 1995-11-17 Machine-vision illumination system and method

Country Status (5)

Country Link
US (1) US5745176A (en)
AU (1) AU7201996A (en)
CA (1) CA2233589C (en)
TW (1) TW284854B (en)
WO (1) WO1997014031A1 (en)

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Also Published As

Publication number Publication date
AU7201996A (en) 1997-04-30
WO1997014031A1 (en) 1997-04-17
US5745176A (en) 1998-04-28
CA2233589A1 (en) 1997-04-17
CA2233589C (en) 2001-09-04

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